Countertop oven



FIG. 1 is a front perspective view of a countertop oven showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a front perspective view of a second embodiment thereof;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a rear eleavationall view thereof;

FIG. 10 is a right side view thereof;

FIG. 11 is a left side view thereof; and,

FIG. 12 is a top plan view thereof.

The portions shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

We claim the ornamental design for a countertop oven, as shown and described. 